After already announcingR. Kelly, Björk, and Belle and Sebastian as the headliners for this year's Pitchfork Music Festival, P4k has revealed that those artists will be joined by Joanna Newsom, The Breeders (playing Last Splash), Swans, El-P, Killer Mike, TNGHT, Chairlift, Sky Ferreira, ...And You Will Know Us By the Trail of Dead, Rustie, Mac DeMarco, Foxygen, Angel Olsen, Trash Talk, and Tree.